Thrall to Demon (Vile)

You formally supplicate yourself to a demon prince. In return for this obedience, you gain a small measure of the demon prince’s power.

(Champions of Ruin, p. 23)

Originally posted on D&Dtools

• Prerequisite Chaotic evil alignment,
• Benefit Once per day, while performing an evil act, you can call upon your demonic patron to add a +1 luck bonus to any one attack roll, saving throw, ability check, skill check, or level check.
• Special This feat can only be taken once. A character who takes this feat cannot also take the Disciple of Darkness or Scion of Sorrow feat.